Cellular Communication System
- Specification
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point-Cellular Communication
- Diagnostic System Check-Cellular Communication
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- DTC B2455: Open In Cellular Microphone Low Reference Circuit, Or Short To Voltage In Cellular Microphone Signal Circuit
- DTC B2470: VCIM Does Not Detect The Presence Of The Cellular Antenna
- DTC B2476: Keypad Signal Circuit Voltage Low
- DTC B2482: A Button Is Depressed Or Stuck For More Than 15 Seconds
- DTC B2483 or B2484: VCIM Does Not Detect A Navigation Signal
- DTC U1500: VCIM Detects An Internal Communication Malfunction
- OnStar Symptom Diagnosis
- Symptoms-Cellular Communication
- Onstar One Or More Buttons Inoperative
- Unable to Contact OnStar Call Center
- Microphone Inoperative-Caller Cannot Be Heard
- Voice Recognition Inoperative
- OnStar Steering Wheel Control Functions Inoperative
- OnStar Button LED Inoperative
- No (or Noisy) OnStar Audio
- Global Positioning System (GPS) Data Not Current or Inaccurate
- Repair Instructions
- Description and Operation